Forecast Details for Rockville, MD

Recent Locations: Rockville, MD  
Current Alerts for Rockville, MD: Winter Storm Warning Winter Weather Advisory
Today: Rain, snow, and sleet before 1pm, then snow, possibly mixed with rain between 1pm and 2pm, then snow after 2pm. The snow could be heavy at times. Temperature falling to around 29 by 5pm. Northeast wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%. Total daytime snow and sleet accumulation of 2 to 4 inches possible.
Tonight: A slight chance of snow before 10pm. Cloudy during the early evening, then gradual clearing, with a low around 18. West wind 10 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
M.L.King Day: Sunny, with a high near 21. Breezy, with a west wind 13 to 20 mph, with gusts as high as 30 mph.
Monday Night: Increasing clouds, with a low around 7. Wind chill values as low as -5. West wind 6 to 11 mph.
Tuesday: A slight chance of snow after 1pm. Mostly cloudy, with a high near 20. West wind 6 to 8 mph. Chance of precipitation is 20%.
Tuesday Night: A chance of snow before 1am. Mostly cloudy, with a low around 6. Chance of precipitation is 30%.
Wednesday: Sunny, with a high near 16.
Wednesday Night: Partly cloudy, with a low around 5.
Thursday: Mostly sunny, with a high near 27.
Thursday Night: Mostly cloudy, with a low around 11.
Friday: Mostly sunny, with a high near 34.
Friday Night: Partly cloudy, with a low around 17.
Saturday: Sunny, with a high near 38.

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Current U.S. National Radar--Current

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Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation